BMW 135i & 335i – Replacing Spark Plugs (N54)

Now that the car is running higher boost, I decided I should probably replace the OEM spark plugs. I went with NGK 5992 plugs because they run 1 step colder than stock and are gappable.

NGK 5992 spark plugs

I visited Bob again because I wanted to test for boost leaks. Part of me was hoping we’d find a small leak somewhere so I could upgrade to a metal charge pipe with a blow-off-valve and a larger intercooler. We didn’t find any leaks, but I’ll still buy those parts sometime soon.

Bob also has the tools for flashing the DME. My first flash was the free BMS E85 flash. It was okay, but I didn’t notice much. I went back and had him load an E85 flash from Wedge. It was great. I ran it for a week or so, took some logs, sent them to Wedge, and he sent back another version of the flash. This time when I visited Bob, I had him load the new flash that Wedge created. On the way home, I pulled up to an E39 M5 on the highway. He toyed with me and once things cleared up, we were able to do a pull. I put bus lengths on him! I’m not sure if I should have expected more out of his 4.9L V8 or if my car is just fast. I plan on hitting up the drag strip next week.

BMW 135i & 335i – BMS Oil Catch Can Install (N54)

When I bought the car, it came with a Riss Racing oil catch can. Good news, right? Well, not so much. After realizing how small the lines were, I couldn’t stop thinking about it. Why wouldn’t they utilize the large lines that the stock PCV system had? Plus, it’s mounted on the hot side, right on top of the turbos! Definitely a re-branded eBay part that I needed to get rid of…

Riss Racing oil catch can

Anyways, I bought a BMS oil catch can because it’s built from the ground up specifically for this car. It’s hoses exceed the OEM PCV piping in diameter and that flow rate is maintained throughout the entire catch can ensuring no excessive crankcase pressure buildup. Unlike the Riss Racing can, the BMS version is mounted on the cold side underneath the cowl for a stealthy look. Holding the two, the BMS oil catch can is the winner, hands down. Gotta love Burger Motorsports’ products.

BMS oil catch can hoses BMS oil catch can

Much better. The hoses are nice and thick and you can’t even see it once the cowl is back on. Very happy with the upgrade.

BMW 135i & 335i – Fuel-It Stage 1 Fuel Pump Install (N54)

I ordered a Fuel-It! Walbro 255 inline fuel pump kit so I could run E85 fuel for more power. The factory LPFP could handle a smaller mix of E85, but it was maxed out at that. I met up with Bob for help with the install. He has installed the pump before and also has the flashing tools and software. We installed the pump this weekend and flashed the ECU with a free E85-specific flash that BMS offers.

BMW 135i ready for install

First step: remove the fuel pump bucket from under the rear seats…

BMW 135i fuel pump location

As you can see in the picture above, we unplugged the connections first. I didn’t take any pictures of the actual removal process. It’s fairly straightforward if you follow Steve’s instructions. Here it is, removed:

BMW 135i fuel bucket

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BMW 135i & 335i – VRSF Catless Downpipes Install (N54)

I bought some used VRSF 3″ catless downpipes for $300 and decided it was time to put them in. Most people on the forums say they would rather pay to have it done if they had to do it all-over again. In other words, I went into this expecting it to take a while…

BMW 135i downpipe install

We were pretty slow throughout the whole process. I was able to loosen most of the nuts, but one in particular was giving me trouble. It was in a really tight spot and we ended up rounding it off. I had a friend heat the stud with a torch and use an air chisel to snap it off.

BMW 135 downpipe install - torch

After we got that out of the way, we still needed to unbolt brackets, v-bands, four O2 sensors, and unhook the whole exhaust from the hangers. We even had to unbolt the steering rack and move it out of the way for more room. I would recommend replacing both v-band clamps when installing downpipes. Maybe we should have started earlier?

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BMW 135i (E82) – ZHP 6-Speed Shift Knob

I was surfing the forums when a good deal popped up for a ZHP shift knob. I’ve always liked the look of the ZHP knob and figured it was time to replace the worn BMW Performance knob that I had.

zhp-shift-knob(Note the wear on the right side)

Finally something to match the steering wheel!
ZHP shift knob

zhp-shift-knob-3 zhp-shift-knob-4

I couldn’t be happier. It’s actually formed to the shape of my hand, unlike the BMW Performance knob. It has a much more natural feel and is easier to go through the gears.

Conclusion: It feels great with the short shifter. Money well spent!

BMW 135i & 335i – Oil Change & CDV Delete

Since Memorial Day is on Monday, I decided to take advantage of the long weekend and do some maintenance on the car. She was due for an oil change so I picked up 7 quarts of Castrol Edge, fully synthetic 5W-30 and a MANN oil filter kit.


I saw a few posts online about people deleting the Clutch Delay Valve for a better clutch feel. Since I was already underneath the car, I figured I might as well try removing this thing:


I popped out the locking pins with a small screwdriver and pulled the valve right out. I quickly capped both lines with my fingers because I didn’t want to lose any brake fluid. After that, I simply connected the lines back together without the valve in place. Then I got to work on bleeding the clutch. The whole process only took about a half hour with the help of a friend. Look how restrictive it is!


This car has the best clutch feel out of any car I’ve ever driven. The CVD delete paired with the BMW Performance short shift kit and the BMS clutch stop really makes for an awesome driving experience.

BMW 135i – BMW Performance Spoiler Install

A big box showed up on my doorstep this weekend…


…and a BMW Performance replica spoiler was inside! The BMW 135i comes with a spoiler from the factory but its tiny and unflattering. This car is begging for something more aggressive. I had to install it right away.

I ordered it on Amazon for cheap. It was already painted to match and fit perfectly. Order yours here:

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